Abstract: A device (1a) for positioning next to an existing sauna heater (3). Device (1a) is equipped with an air duct (2?) which is designed to conduct air from a level close to the floor in a sauna to a location close to the upper part of the sauna heater. The air from the floor (91) will be combined with the hot air from sauna heater (3?). The device will increase the airflow (92) down towards the lower parts of the sauna, which results in a more even temperature distribution and a more comfortable sauna experience.